Allows better matches on markdown formatted urls

* Client-side showUserInfo is no longer cleared
* Server-side now handles empty messages
* Added error message if username or message are empty

Added check on username according to app settings for name validation.

If the scroll event does not get triggered, the "has more..." link does nothing. This adds the capability to click the "has more..." link and load more message search results

Missing mustaches for author url

Switched new files to .js instead of .coffee;